Find length of a cuboid surface area 256cm² given h=12 b=5
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Answer:
Hey mate here is your answer....
Step-by-step explanation:
As area = l×b×h....
thats why you have to divide( 12×5) from the total area I.e., 256cm²
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Step-by-step explanation:
Given Surface area of a cuboid = 256 cm²
h = 12 cm
b = 5 cm
l = ?
Formula
Surface Area of cuboid = 2(lb + bh + lh )
256 = 2[(L×5) + (5×12) + (L×12)]
256 = 2(5L + 60 + 12L)
256/2 = (60 + 17L)
128 = 60 + 17L
17L = 68
L = 68/17
L = 4 cm
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